90143253 has 8 divisors (see below), whose sum is σ = 133545600. Its totient is φ = 60095484.

The previous prime is 90143243. The next prime is 90143293. The reversal of 90143253 is 35234109.

It is not a de Polignac number, because 90143253 - 2¹⁰ = 90142229 is a prime.

It is a super-2 number, since 2×90143253² = 16251612122844018, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 3338639 = 90143253 / (9 + 0 + 1 + 4 + 3 + 2 + 5 + 3).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90143243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1669293 + ... + 1669346.

It is an arithmetic number, because the mean of its divisors is an integer number (16693200).

Almost surely, 2^90143253 is an apocalyptic number.

It is an amenable number.

90143253 is a deficient number, since it is larger than the sum of its proper divisors (43402347).

90143253 is a wasteful number, since it uses less digits than its factorization.

90143253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3338648 (or 3338642 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 90143253 is about 9494.3800745494. The cubic root of 90143253 is about 448.3781170130.

The spelling of 90143253 in words is "ninety million, one hundred forty-three thousand, two hundred fifty-three".